Rising Temperature Is a More Important Driver Than Increasing Carbon Dioxide Concentrations in the Trait Responses of Enhalus acoroides Seedlings
Increasing temperature and CO<sub>2</sub> concentration are among the most important factors affecting marine ecosystems under climate change. We investigated the morphological, biochemical, and physiological trait responses of seedlings of the tropical seagrass <i>Enhalus acoroide...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/316347 |
| Acceso en línea: | http://hdl.handle.net/10261/316347 |
| Access Level: | acceso abierto |
| Palabra clave: | Centro Oceanográfico de A Coruña Medio Marino carbon dioxide carbon seedlings temperature |
| Sumario: | Increasing temperature and CO<sub>2</sub> concentration are among the most important factors affecting marine ecosystems under climate change. We investigated the morphological, biochemical, and physiological trait responses of seedlings of the tropical seagrass <i>Enhalus acoroides</i> under experimental conditions. Trait responses were greater under temperature effects than increasing CO<sub>2</sub> concentration. Seedlings under rising temperatures showed enhanced leaf growth, lower leaf nutrient content, and stimulated down-regulating mechanisms in terms of photo-physiology. Increasing CO<sub>2</sub> concentrations did not show any significant effects independently. There was a significant interaction for some of the trait responses considered, such as leaf number and carbon content in the roots, and trends of higher starch concentrations in the leaves and lower <i>rETR</i><sub>max</sub> under combined enriched CO<sub>2</sub> and high temperature, even though none of these interactions were synergistic. Understanding the single and interactive trait responses of seagrass seedlings to increasing temperature and CO<sub>2</sub> concentration is of importance to determine the relative responses of early life stages of seagrasses, which may differ from adult plants, in order to form a more holistic view of seagrass ecosystem health under climate change. |
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